Formation damage study with a horizontal wellbore model

Saleh, Saad; Rustam, Reffanda Kurniawan; El-Rabaa, Wadood; Islam, M.R.

doi:10.1016/s0920-4105(96)00058-7

Cited by 11 publications

(2 citation statements)

References 6 publications

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“…Either maximum formation damage occurs at the heel-and minimum at the tip-of the well if the exposure time effect is preponderant (Economides and Frick 1992) or the opposite if the well is drilled under severe overbalanced conditions (Saleh et al 1997). In any case, the skin distribution along the horizontal well will most probably be non-uniform, and this is expected to affect the overall horizontal well productivity significantly (Menouar et al 1999).…”

Section: Role Of Formation Damage In the Reduction Of The Productivitmentioning

confidence: 99%

Effect of Heterogeneity on Formation Damage in Long Horizontal Wells: An Experimental Study

Menouar

2013

SPE Western Regional &Amp; AAPG Pacific Section Meeting 2013 Joint Technical Conference

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This study is directed toward an experimental investigation of formation damage in a large heterogeneous reservoir from the Middle East. A number of experiments using real reservoir core samples at reservoir conditions of pressure and temperature have been performed. Various drilling fluid contact times with the formation and overbalance pressures have been used during these experiments. The analysis of the experimental data shows that the results have been predominantly marked by the heterogeneous nature of this reservoir. The heterogeneity of the cores affects to a great extent how the damage due to drilling fluids occurs. The results show as expected that the damage permeability increases with the contact time. As a consequence, extended drilling causes additional formation damage and higher skin. Also, without contradicting the detrimental effect of the overbalance pressure on formation damage, the experimental data show an unexpected result: Higher permeability zones of the reservoir are affected much more significantly by the drilling fluids' damage than lower permeability zones. Similar results are obtained for invasion depth. The effect of the magnitude of the permeability on formation damage is so strong that it masks the effect of overbalance pressure on formation damage. A straight-forward conclusion is that stimulation jobs in such reservoirs should have as a primary objective to stimulate in priority the most permeable zones that have been damaged along the horizontal well instead of the low permeability zones since it pays more to regain a fraction of a very high permeability than the same or smaller fraction of a low permeability zone. Another conclusion of this study is that it is of paramount importance in formation damage to assess accurately the effect of the horizontal well effective length and its contribution to the productivity of the well compared to other parameters such as the damage permeability, the invasion depth, or the anisotropy ratio.

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Section: Role Of Formation Damage In the Reduction Of The Productivitmentioning

confidence: 99%

Effect of Heterogeneity on Formation Damage in Long Horizontal Wells: An Experimental Study

Menouar

2013

SPE Western Regional &Amp; AAPG Pacific Section Meeting 2013 Joint Technical Conference

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“…Few studies were based on the experimental determination of skin factors 19 or on the use of well bore models to simulate realistic radial flow conditions for horizontal wells 26 and evaluate the pre-and post-mud damage on the well productivity and injectivity.…”

Section: Literature Reviewmentioning

confidence: 99%

Effect of Formation Damage, Length and Reservoir Thickness on the Inflow Performance of Horizontal Wells

Menouar¹,

Al-Majed²,

Hassan³

2000

SPE/DOE Improved Oil Recovery Symposium

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractHorizontal wells offer many advantages, compared to vertical ones. However up to now, their performance did not always live up to expectation especially in the Middle East where vertical wells are commonly naturally prolific. This has been attributed in general to near well bore formation damage. Because of their large contact area of reservoir rock, horizontal wells are more susceptible to drilling and workover induced formation damage than vertical ones. The effect of skin damage on horizontal wells has been abundantly discussed in the literature; however, the method of handling the calculations varies from one author to the other. In most cases, the authors did not take into consideration friction, the variation of skin along the horizontal section of the well and the perforation distribution. It is common now to drill very long horizontal wells where the skin may vary along the well. Therefore, it is important to estimate the real contribution of the different sections of the horizontal well to the total production of the well and the role of formation damage and friction in the overall performance of the well.The present paper addresses the case of highly permeable reservoirs displaying variable skin along the horizontal section of the well. Friction losses as well as perforation distribution are taken into account. A literature survey is conducted in order to understand the role of formation damage and friction. A semi analytical approach is used to study the simultaneous effect of perforation distribution, near well bore formation damage and friction losses on the production of horizontal wells. The results show the effect of various well parameters such as well length, anisotropy ratio, skin and perforation distribution on the inflow performance of the horizontal well. The study shows particularly that:

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2019

Economically and Environmentally Sustainable Enhanced Oil Recovery

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Formation damage study with a horizontal wellbore model

Cited by 11 publications

References 6 publications

Effect of Heterogeneity on Formation Damage in Long Horizontal Wells: An Experimental Study

Effect of Heterogeneity on Formation Damage in Long Horizontal Wells: An Experimental Study

Effect of Formation Damage, Length and Reservoir Thickness on the Inflow Performance of Horizontal Wells

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